否定转移
否定转移是指在think , guess , suppose , believe等动词后面的宾语从句中,如果是否定句则要改为肯定句,同时把主句改为否定句。
如:I think(that)he isn’t a teacher . X
→ I don’t think(that)he is a teacher .
I believe(that)he can’t come here on time . X
→ I don’t believe(that)he can come here on time .
he第三人称,应该是he dosen‘t;故前句He thinks it is not helpful错误,
应改为He dosen‘t think it is helpful
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